CN110474699A - A method of improving single channel amplitude-comprised direction-finding equipment direction finding speed - Google Patents
A method of improving single channel amplitude-comprised direction-finding equipment direction finding speed Download PDFInfo
- Publication number
- CN110474699A CN110474699A CN201910779450.8A CN201910779450A CN110474699A CN 110474699 A CN110474699 A CN 110474699A CN 201910779450 A CN201910779450 A CN 201910779450A CN 110474699 A CN110474699 A CN 110474699A
- Authority
- CN
- China
- Prior art keywords
- finding
- maximum value
- signal
- single channel
- directional aerial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radio Transmission System (AREA)
Abstract
The invention discloses a kind of methods for improving single channel amplitude-comprised direction-finding equipment direction finding speed, comprising: control hilted broadsword N throw switch is successively spaced conducting antenna, and direction-finding receiver extracts the signal amplitude maximum value that antenna measures signal respectively；Judgement: whether there is an antenna: its signal amplitude maximum value is maximum and is greater than pre-determined threshold T1 with the difference of the signal amplitude maximum value of other antennas, if it exists, its two adjacent antenna is then opened respectively and obtains signal amplitude maximum value, by triantennary amplitude-comprised direction-finding algorithm, signal arrival bearing is calculated.Otherwise, it is determined whether there are two antennas: the difference of the adjacent conducting of the two and signal amplitude maximum value if so, opening the antenna among the two antennas, and obtains signal amplitude maximum value by direction-finding receiver in pre-determined threshold T2；By triantennary amplitude-comprised direction-finding algorithm, signal arrival bearing is calculated.The present invention reduces the antenna amounts that direction finding needs to accumulate signal, promote single channel amplitude-comprised direction-finding processing speed.
Description
Technical field
The present invention relates to radio communications and monitoring radio-frequency spectrum technical field, are a kind of raising single-passes specifically
The method of road amplitude-comprised direction-finding equipment direction finding speed.
Background technique
Single channel amplitude-comprised direction-finding is produced in radio communication and spectrum monitoring field in order to reduce direction-finding equipment cost
Technology refers to that timesharing receives data between all antennas with the receiving device of only one radio frequency reception channel, finally integrates
Handle the technology that data obtain signal incoming wave orientation.There are multipaths, screening due to the modulation of signal itself or in communication process
The disturbance such as gear, the signal amplitude for reaching direction-finding equipment antenna is not constant, the amplitude data one of single channel amplitude-comprised direction-finding application
As be all the maximum value of current amplitude whithin a period of time, just need certain time to complete the extraction of signal maximum here.
Specific implementation flow is as follows: assuming that space has N number of equally distributed directional aerial, the principle using antenna electric scanning passes through list
Knife N throw switch connects each antenna one by one, obtains the Amplitude maxima of current antenna one by one by single channel direction-finding receiver,
Further according to the data for maximum three respective antennas of maximum selection rule signal power that each antenna extracts, using mature three
Antenna ratio width Direction Finding Algorithm obtains aspect.Assuming that single channel direction-finding receiver obtain that aerial signal amplitude needs when
Between be t0, then complete single pass needs total time be N × t0.It falls short of for the signal retention time and (is less than N × t0), then
It is not enough to that all antennas is supported to complete the case where signal maximum obtains, then will lead to unacceptable angle measurement error.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for improving single channel amplitude-comprised direction-finding equipment direction finding speed, for solving
Need to obtain the Amplitude maxima of each antenna in the prior art one by one, test speed is slower, if the signal retention time is inadequate
It is long, all antennas cannot be supported to complete the problem of maximum value acquisition leads to angle measurement error.
The present invention is solved the above problems by following technical proposals:
A method of improving single channel amplitude-comprised direction-finding equipment direction finding speed, including the equally distributed N in 360 ° of orientation
A directional aerial, wherein N is the even number more than or equal to 6, and the output end of directional aerial is separately connected hilted broadsword N throw switch not
The moved end of moved end, hilted broadsword N throw switch connects single channel direction-finding receiver, and testing procedure includes:
Step S100: control hilted broadsword N throw switch sequentially turns on the 1st, 3 ... ..., and N-1 directional aerial, single channel direction finding connects
Receipts machine extracts the 1st, 3 respectively ... ..., and N-1 directional aerial measures the signal amplitude maximum value of signal；
The process flow for extracting signal amplitude is as follows:
Signal passes through one after handling by low noise amplification, down coversion, filtering etc. inside single channel direction-finding receiver
Sample rate is that the analog-to-digital conversion of 102.8MSPS obtains digital signal, then one 2048 points of DFT processing is carried out inside FPGA,
The maximum point of amplitude is found in DFT result, using its amplitude as the Amplitude maxima of current frequency point.
Step S200: judgement: whether there is a directional aerial: its signal amplitude maximum value is maximum and orients day with other
The difference of the signal amplitude maximum value of line is greater than pre-determined threshold T1, if it is present entering step S300, such case is set to feelings
Condition A；Otherwise, it is determined whether there are two directional aerials: the difference of the adjacent conducting of the two and the signal amplitude maximum value of the two exists
In pre-determined threshold T2, if so, entering step S400, such case is set to situation B；
Step S300: it is opened respectively by hilted broadsword N throw switch adjacent with the maximum directional aerial of signal amplitude maximum value
It is maximum to obtain the corresponding signal amplitude of two neighboring directional aerial by single channel direction-finding receiver respectively for two directional aerials
Value calculates arrival bearing using triantennary amplitude-comprised direction-finding algorithm；
Step S400: it is opened by hilted broadsword N throw switch and is located at adjacent conducting and signal amplitude maximum value difference in pre- gating
The directional aerial among two directional aerials in T2 is limited, and signal amplitude maximum value is obtained by single channel direction-finding receiver,
By triantennary amplitude-comprised direction-finding algorithm, signal arrival bearing is calculated.
This method does not need that all directional aerials are connected, and only uses the signal magnitude data of a part of directional aerial, just
Single channel amplitude-comprised direction-finding may be implemented, improve the processing speed of direction finding.In situation A, need to carry out having for signal amplitude extraction
N/2+2, processing speed promotes ratio at this time are as follows: 1- (N/2+2)/N；
In situation B, need to carry out the N/2+1 that has of signal amplitude extraction, the ratio that processing speed is promoted at this time are as follows: 1- (N/2
+1)/N.From the point of view of spacing wave distribution, both probability being likely to occur are 50%.Therefore, the comprehensive of this method promotes ratio
Example η are as follows:
By above formula as it can be seen that the effective precondition of this method must satisfy η >=0, obtain, N >=3.
Because if directional aerial quantity is very little in Project Realization, it is necessary to the airspace of single directional antenna covering increases,
Lead to the bad control of the consistency of directional aerial gain decline and directional aerial, due to needing guarantee is certain to determine when equipment is realized
To antenna gain and direction finding precision, the directional aerial quantity of direction-finding equipment is generally not less than 6 in engineering, and than width equipment
Directional aerial number generally uses even number, so this method has universal applicability.
When directional aerial quantity N increases, the ratio η of promotion is gradually increased, and maximum is no more than 50%, when shortening test
Between, it avoids since the signal retention time falls short of, the problem of maximum value acquisition leads to angle measurement error cannot be completed.Increase at this time
A few secondary antenna Amplitude Ratios compared with the time needed with threshold judgement be only several clock cycle (nanosecond order), bring increase
Processing delay can be ignored.
Further, the 3dB velocity of wave width of N number of directional aerial is 360 °/N.
Compared with prior art, the present invention have the following advantages that and the utility model has the advantages that
The present invention is first carried out once on the basis of mature triantennary amplitude-comprised direction-finding algorithm using one directional aerial in interval
Coarse scanning, according to coarse scanning as a result, the mode for specified directional aerial of targetedly performing fighting again, reduces direction finding and need to accumulate letter
Number directional aerial quantity, achieve the purpose that promoted single channel amplitude-comprised direction-finding processing speed.
Detailed description of the invention
Fig. 1 is hardware platform schematic diagram of the present invention in 6 directional aerial；
Fig. 2 is that the azimuth beam of 6 directional aerials covers schematic diagram.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1:
Fig. 1 include Fig. 2 be number 1-6 6 directional aerials azimuth beam cover schematic diagram, wherein solid line be 1,3,
No. 5 directional aerials, 2,4, No. 6 directional aerials of dotted line.- 3dB the beam angle of each directional aerial is 60 °, adjacent orientation day
- 3dB the wave beam of line (such as No. 1 and No. 2 directional aerials) intersects in airspace.Being spaced a directional aerial, (such as No. 1 and No. 3 fixed
To antenna) -8dB wave beam airspace intersect.It is spaced -13dB the wave beam of two directional aerials (such as No. 1 and No. 4 directional aerials)
Intersect in airspace.Directional antenna beams are only used for determining the number of required setting thresholding in this method in the crosspoint in airspace
Value, can adjust according to actual orientation antenna measurement result, not be mandatory requirement.
A method of single channel amplitude-comprised direction-finding equipment direction finding speed being improved, the hardware platform of implementation is as shown in Figure 1, orientation
To equally distributed directional aerial 1-6, six throw switch of hilted broadsword, a single channel direction-finding receiver, wherein directional aerial 1-6
It is connect respectively with six input ports of six throw switch of hilted broadsword, the delivery outlet of six throw switch of hilted broadsword is connected to single channel direction finding reception
Machine.
The main process flow that single channel direction-finding receiver extracts signal amplitude is as follows: signal is in single channel direction-finding receiver
Inside is obtained after being handled by low noise amplification, down coversion, filtering etc. by the analog-to-digital conversion that a sample rate is 102.8MSPS
To digital signal, then inside FPGA, the DFT of one 2048 points of progress is handled, and the maximum point of amplitude is found in DFT result, will
Its amplitude is as the Amplitude maxima for working as frequency point.
Testing procedure:
Control six throw switch of hilted broadsword is respectively turned on 1,3, No. 5 directional aerial, is extracted and is corresponded to by single channel direction-finding receiver
1, the signal amplitude maximum value of 3, No. 5 directional aerials；
If centainly thering is a directional aerial to measure in 1,3, No. 5 directional aerial having tested there are signal in airspace
Signal amplitude maximum value be much larger than or be approximately equal to and adjacent surveyed directional aerial.
When the signal amplitude maximum value for having directional aerial (such as No. 3) to measure is much larger than (antenna beam according to fig. 2
Intersection situation be arranged thresholding T1) other directional aerial (No. 1 and No. 5) when (be defined as situation A), then by six throw switch of hilted broadsword divide
Not Da Kai directional aerial (No. 3) adjacent position directional aerial (No. 2 and No. 4), by single channel direction-finding receiver obtain it is adjacent
The signal amplitude maximum value of directional aerial (No. 2 and No. 4).By triantennary amplitude-comprised direction-finding algorithm bring into directional aerial (No. 3) with
The signal amplitude maximum value of neighboring directional antenna (No. 2 and No. 4) calculates signal arrival bearing.In case a, single channel direction finding
The directional aerial quantity that receiver needs to extract signal amplitude is 5, is extracted compared with the data for completing all directional aerials one by one,
Processing speed improves 1/6.
When the signal amplitude value for having directional aerial (such as No. 1) to measure is approximately equal to (directional antenna beams according to fig. 2
Thresholding T2 is arranged in intersection situation) (be defined as situation B) when one of them has surveyed neighboring directional antenna (such as No. 3), then pass through list
The directional aerial (No. 2) among two directional aerials is connected in six throw switch of knife, obtains signal width by single channel direction-finding receiver
Spend maximum value.The signal amplitude when first three directional aerial (No. 1, No. 2, No. 3) is brought by triantennary amplitude-comprised direction-finding algorithm, is counted
Calculate signal arrival bearing.At situation B, the directional aerial quantity that single channel direction-finding receiver needs to extract signal amplitude is 4,
It is extracted compared with the data for completing all directional aerials one by one, processing speed improves 1/3.
From the point of view of spacing wave distribution, the probability that situation A and situation B are likely to occur is 50%.Then this method is fixed at 6
To in the case where antenna to the synthesis promotion ratio η of direction finding speed are as follows:
[(1/6)+(1/3)]/2=1/4=25%
It during direction finding described in this method, does not need to gate all directional aerials, only uses a part orientation day
The signal magnitude data of line, so that it may single channel amplitude-comprised direction-finding is realized, to promote the processing speed of direction finding.
The directional aerial quantity of direction-finding system extends to N number of situation, at this time the 3dB beam angle of each directional aerial
For 360 °/N, N number of directional aerial is uniformly distributed within the scope of 360 ° of orientation.
The corresponding promotion of common antenna quantity is shown in Table 1 than column:
| Antenna amount N | Promotion ratio |
| 6 | 0.25 |
| 8 | 0.3125 |
| 10 | 0.35 |
| 12 | 0.375 |
The corresponding promotion ratio of the common quantity antenna of table 1
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiment of the present invention are not limited by the above embodiments, it should be appreciated that those skilled in the art
Member can be designed that a lot of other modification and implementations, these modifications and implementations will fall in principle disclosed in the present application
Within scope and spirit.
Claims (2)
1. a kind of method for improving single channel amplitude-comprised direction-finding equipment direction finding speed, which is characterized in that including in 360 ° of orientation
N number of directional aerial of even distribution, wherein N is the even number more than or equal to 6, and the output end of directional aerial is separately connected hilted broadsword N and throws
The moved end of the non-moving end of switch, hilted broadsword N throw switch connects single channel direction-finding receiver, and testing procedure includes:
Step S100: control hilted broadsword N throw switch sequentially turns on the 1st, 3 ... ..., N-1 directional aerial, single channel direction-finding receiver
The 1st, 3 is extracted respectively ... ..., N-1 directional aerial measures the signal amplitude maximum value of signal；
Step S200: judgement: whether there is a directional aerial: its signal amplitude maximum value it is maximum and with other directional aerials
The difference of signal amplitude maximum value is greater than pre-determined threshold T1, if it is present entering step S300；Otherwise, it is determined whether in the presence of
Two directional aerials: the two it is adjacent conducting and the signal amplitude maximum value of the two difference in pre-determined threshold T2, if so, into
Step S400；
Step S300: two adjacent with the maximum directional aerial of signal amplitude maximum value are opened by hilted broadsword N throw switch respectively
Directional aerial obtains the corresponding signal amplitude maximum value of two neighboring directional aerial by single channel direction-finding receiver respectively, adopts
Arrival bearing is calculated with triantennary amplitude-comprised direction-finding algorithm；
Step S400: it is opened by hilted broadsword N throw switch and is located at adjacent conducting and signal amplitude maximum value difference in pre-determined threshold T2
Directional aerial among two interior directional aerials, and signal amplitude maximum value is obtained by single channel direction-finding receiver, pass through
Triantennary amplitude-comprised direction-finding algorithm calculates signal arrival bearing.
2. a kind of method for improving single channel amplitude-comprised direction-finding equipment direction finding speed according to claim 1, which is characterized in that
The 3dB velocity of wave width of N number of directional aerial is 360 °/N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910779450.8A CN110474699B (en) | 2019-08-22 | 2019-08-22 | Method for improving direction-finding speed of single-channel amplitude-comparison direction-finding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910779450.8A CN110474699B (en) | 2019-08-22 | 2019-08-22 | Method for improving direction-finding speed of single-channel amplitude-comparison direction-finding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110474699A true CN110474699A (en) | 2019-11-19 |
| CN110474699B CN110474699B (en) | 2021-06-15 |
Family
ID=68513317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910779450.8A Active CN110474699B (en) | 2019-08-22 | 2019-08-22 | Method for improving direction-finding speed of single-channel amplitude-comparison direction-finding equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110474699B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065732A (en) * | 1991-04-09 | 1992-10-28 | 俞惟铨 | Vehicular radio is monitored direction finding system and system |
| US20100046586A1 (en) * | 1998-12-11 | 2010-02-25 | Freescale Semiconductor Inc. | Method and system for performing distance measuring and direction finding using ultrawide bandwitdh transmissions |
| CN102445679A (en) * | 2011-09-22 | 2012-05-09 | 成都中安频谱科技有限公司 | Direction finding method of three-channel spatial spectrum estimation direction finding system |
| CN102565756A (en) * | 2010-12-17 | 2012-07-11 | 上海无线电设备研究所 | Single-channel radiolocation direction-finding system direction-finding method thereof |
| US20140232572A1 (en) * | 2013-02-19 | 2014-08-21 | King Fahd University Of Petroleum And Minerals | Circular antenna array for vehicular direction finding |
| CN105933078A (en) * | 2016-06-23 | 2016-09-07 | 成都点阵科技有限公司 | Multi-antenna single-channel radio direction finding system and method having optimal amplitude comparison |
| CN106932753A (en) * | 2017-03-14 | 2017-07-07 | 湖南雷神电子科技有限公司 | Anti- unmanned plane passive detection and direction detecting positioning system |
| CN107861095A (en) * | 2017-10-10 | 2018-03-30 | 上海交通大学 | A kind of single radio-frequency channel two dimensional wireless electricity direction-finding system |
| CN207799060U (en) * | 2017-12-28 | 2018-08-31 | 中兴仪器（深圳）有限公司 | A kind of device based on low-frequency range and high band mixing direction-finder antenna |
| CN108832312A (en) * | 2018-06-21 | 2018-11-16 | 杭州捍鹰科技有限公司 | A kind of Omni-directional antenna array and antenna traversal method |
| CN109031185A (en) * | 2018-07-13 | 2018-12-18 | 中睿通信规划设计有限公司 | A kind of fixed point amplitude-comprised direction-finding method based on unmanned plane |
| CN109669178A (en) * | 2018-12-25 | 2019-04-23 | 中国航天科工集团八五研究所 | A kind of spaceborne three array element pulse bidimensional direction-finding method |
-
2019
- 2019-08-22 CN CN201910779450.8A patent/CN110474699B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065732A (en) * | 1991-04-09 | 1992-10-28 | 俞惟铨 | Vehicular radio is monitored direction finding system and system |
| US20100046586A1 (en) * | 1998-12-11 | 2010-02-25 | Freescale Semiconductor Inc. | Method and system for performing distance measuring and direction finding using ultrawide bandwitdh transmissions |
| CN102565756A (en) * | 2010-12-17 | 2012-07-11 | 上海无线电设备研究所 | Single-channel radiolocation direction-finding system direction-finding method thereof |
| CN102445679A (en) * | 2011-09-22 | 2012-05-09 | 成都中安频谱科技有限公司 | Direction finding method of three-channel spatial spectrum estimation direction finding system |
| US20140232572A1 (en) * | 2013-02-19 | 2014-08-21 | King Fahd University Of Petroleum And Minerals | Circular antenna array for vehicular direction finding |
| CN105933078A (en) * | 2016-06-23 | 2016-09-07 | 成都点阵科技有限公司 | Multi-antenna single-channel radio direction finding system and method having optimal amplitude comparison |
| CN106932753A (en) * | 2017-03-14 | 2017-07-07 | 湖南雷神电子科技有限公司 | Anti- unmanned plane passive detection and direction detecting positioning system |
| CN107861095A (en) * | 2017-10-10 | 2018-03-30 | 上海交通大学 | A kind of single radio-frequency channel two dimensional wireless electricity direction-finding system |
| CN207799060U (en) * | 2017-12-28 | 2018-08-31 | 中兴仪器（深圳）有限公司 | A kind of device based on low-frequency range and high band mixing direction-finder antenna |
| CN108832312A (en) * | 2018-06-21 | 2018-11-16 | 杭州捍鹰科技有限公司 | A kind of Omni-directional antenna array and antenna traversal method |
| CN109031185A (en) * | 2018-07-13 | 2018-12-18 | 中睿通信规划设计有限公司 | A kind of fixed point amplitude-comprised direction-finding method based on unmanned plane |
| CN109669178A (en) * | 2018-12-25 | 2019-04-23 | 中国航天科工集团八五研究所 | A kind of spaceborne three array element pulse bidimensional direction-finding method |
Non-Patent Citations (3)
| Title |
|---|
| MINGJIAN LI，ET AL.: "A Compact, Low-Cost, Ultrawideband Direction-Finding System: Techniques Suitable for Small-Aperture Designs", 《IEEE ANTENNAS AND PROPAGATION MAGAZINE》 * |
| 刘兴明: "高精度宽开比幅测向方法研究及工程实现", 《中国优秀博硕士学位论文全文数据库（硕士）社会科学I辑（经济政治与法律）》 * |
| 孟祥豪等: "圆阵单通道顺序采样二维超分辨测向算法", 《探测与控制学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110474699B (en) | 2021-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101109798B (en) | Direction finding method of accurate direction finding device for P/L waveband radiation source | |
| CN110031729A (en) | Detection method, system and the data fusion analytical unit in local discharge signal source | |
| CN106357351A (en) | Phased-array calibration system and method | |
| CN109167746A (en) | Continuous wave and the quick identification device of pulse signal | |
| CN101105525A (en) | Pure phase type broad frequency band microwave radiation source direction finding system and method | |
| US9838882B1 (en) | Dynamic frequency selection with discrimination | |
| CN109633523B (en) | Method for estimating incoming wave angle by using directional diagram superposition antenna for indoor positioning | |
| CN107329127B (en) | A kind of phase linearity analysis method and system for radar system DBF Function detection | |
| CN104767573B (en) | A kind of processing method and processing device of exterior aerial gain test multi-path interference identification | |
| CN106154218B (en) | A kind of radio monitoring and direction-finding method | |
| CN107276691B (en) | Method and device for determining direction angle of antenna | |
| CN103869334B (en) | The automatic identification of GNSS spacing wave distortion and disposal route | |
| CN111796241A (en) | Side lobe suppression method for amplitude comparison between multi-beam array beams | |
| CN114545342B (en) | Radar pulse signal parameter measurement method using multichannel reconnaissance receiver | |
| CN110474699A (en) | A method of improving single channel amplitude-comprised direction-finding equipment direction finding speed | |
| CN112698267B (en) | Interference source testing and positioning method | |
| CN110208737A (en) | A kind of ultrashort wave binary channels broadband direction-finding system and thresholding determine direction-finding method | |
| CN104967491B (en) | Multichannel width tests system signal reception processing method mutually | |
| CN107589419A (en) | A kind of method of energy peak joint wideband Range Profile Objective extraction | |
| Lombardo et al. | PBR activity at INFOCOM: adaptive processing techniques and experimental results | |
| CN210243826U (en) | Radar multichannel signal preprocessing device and pulse compression unit thereof | |
| CN106162681A (en) | The detection method of a kind of GSM900 second harmonic interference and device | |
| CN103052120B (en) | A kind of GSM select frequency automatically device and automatic frequency selection method | |
| US5418540A (en) | Method and apparatus for eliminating signal sidelobes from a received signal frame in a multichannel receiver | |
| CN115616482B (en) | Single-station passive unmanned aerial vehicle monitoring method, device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 610045 No. 130 Wuxing Fourth Road, Wuhou New Town Management Committee, Chengdu City, Sichuan Province Applicant after: Chengdu Huari Communication Technology Co., Ltd Address before: 610045 No. 130 Wuxing Fourth Road, Wuhou New Town Management Committee, Chengdu City, Sichuan Province Applicant before: CHENGDU HUARI COMMUNICATION TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |